docs: def get_min_distance(self, mesh):
          """
          For each point in ``mesh`` compute the minimum distance to each
          surface element and return the smallest value.
  
          See :meth:`superclass method
          <.base.BaseSurface.get_min_distance>`
          for spec of input and result values.
          """
          dists = [surf.get_min_distance(mesh) for surf in self.surfaces]
  
          return numpy.min(dists, axis=0)